# print(0%2) # 0 双
# print(1%2) # 1 单
# print(2%2) # 0 双
# print(3%2) # 1 单
# print(4%2) # 0 双
# print(5%2) # 1 单
# print(6%2) # 0 双

a=0
# 从0到6 只打印单数
while a<=6:
    if a%2==1:
        print(a)
    a+=1